Fluorine lined high performance butterfly valve body adopts split combination, which stem and butterfly valve as one, surface evenly wrapped with a layer of fluorine plastic, strong adhesion with steel parts. Only the perfluorinated plastic seat and the fluorine - lined plastic disc are in contact with the medium when the valve works. Valve body channel inside surface smooth, fluid resistance is small, high cv value, strong flow capacity, moderate torque, fully achieve zero leakage medium, the valve is small, light weight, reasonable design, compact structure, quick switching, beautiful appearance, reliable performance, light operation, long service life.